Dictating machine cylinder vacuum cleaner



Patented Nov. 3, 1936 UNITED STATES PATENT OFFICE momma MACHINE crpnvnsa VACUUM CLEANER Gustave Miller, New Haven, Conn.

' Application June 13, 1933, Serial No. 675,625

. 7 Claims. 01.. 274-47) (Granted under the act of March 3, 1883, as

- amended April 30, 1928; 370 0. G. 757) This invention relates to dictating machine cylinder vacuum cleaner and has for an object to provide an improved cleaning mechanism for re-.

moving the fuzz on a dictating machine cylinder as it is created during the process of dictating to the machine.

A further object of this invention is to provide an improved cleaning mechanism for'the blank or cylinder of a recording or dictating machine which operates simultaneously with the process of dictating to the machine.

A further object of this invention is to provide a cleaner for a dictating cylinder which serves to continuously eliminate the fuzz produced by the dictating stylus on the dictating cylinder.

- A further object of this invention is to provide a vacuum cleaner for the cylinder of the dictating machine which serves to continuously remove the fuzz produced by the dictating stylus on the cylinder and which does not need any additional motive power over that already provided in the dictating machine. 7

A further object of this invention is to provide a vacuum cleaner for the cylinder of the dictat ing machine wherein pressure normally created by the dictating machine is utilized to create a vacuum and withdraw the fuzz from the cylinder and deposit it in a suitable receptacle.

. With the above and other objects in view, the

invention consists in the construction, combination and arrangement of parts as will be hereinafter more fully described.

Reference is to be had to the accompanying drawing forming a part of this specification in which like reference characters indicate corresponding parts throughout the several views and in which:

Fig. 1 is a partly elevational and partly sectional view of a dictating machine to which this invention has been applied;

Fig. 2 is a sectional view partly broken away on line 2-2 of Fig. 1; and

Fig. 3 is a schematic outline of the application of this invention.

There is shown at ill a schematic representa-- tion of a dictating machine, this dictating machine being of the typecommercially known as the Dictaphone, the Ediphone, or other similar types of recording or dictating machines. The

dictating machine l0 has the usual operating motor ll placed within the base l2 and connected by a beltl3 to a pulley on a shaft II which operates within the boss I! to control the rotation of the recording blank or dictating cylinder 56 iii in the usual manner. A stylus plate I! is dictation is taking place.

actuated over the surface of the dictating cylinder It in the usual manner and has a talking tube l8 for activating the dictating stylus point I9. As the stylus point I9 is actuated over the dictating cylinder l6 by the vibrations of the 5 sound through the talking tube iii the stylus point l9 produces a fuzz or minute shavings from the surface of the dictating cylinder It as it records the sound vibrations therein. All of the aforesaid mechanism is conventional and well known. 10 and found in the commercial dictating machines above referred to and fornrno part of this invention per se.

Projecting from the motor II in the base I2 is a shaft 20 provided with a series of fan blades 15 2|. In one of the above types of machine these fan blades 2| are already present for the purpose of cooling a control coil (not shown) which is used in connection with the mechanism, but if such is not already present this shaft 20 and 20 blades 2| are necessarily provided. The blades 2| during the operation of the motor provide a, current of air part of which is collected in the cone-shaped receiver 22 to provide a pressure passing through the pipe 23 to a removable con- 25 tainer 24, the container 24 being at least partially perforated to allow the pressure to escape therefrom. The pipe 23 is provided with a restriction 25 at which point a joining pipe 26 is secured thereto. The other endof this joining pipe 26, 30 which will be of rubber or other suitable flexible material, terminates in a wide flattened mouth or nozzle 21, which is secured to the bottom of the stylus plate I! so that the opening is closely adjacent the stylus point l9. In operation the 35 motor .II is always necessarily operated while The fan blades 2| create a pressure through the pipe 23, which pressure is increased by means of the restriction 25 projecting therein. According to well-known 40 laws of physics, the air rushing past the end of the restriction 25 creates a vacuum behind this restriction 25, at which point the end of the pipe 26 is joined, thus creating a vacuum in the pipe 26. The vacuum in the pipe 26 is relieved by air entering the wide flattened mouth or nozzle 21,

.and inasmuch as this air is drawn from the 1111- mediatevicinity of the stylus point ",it carries with it the fuzz or shavings created by the stylus 50 point IS on the surface of the dictating cylinder l6 and removes this fuzz or shavings. through the pipe 26 and the pipe 23 into the container 2!.

Container 24 may be. emptied from time to time as may be necessary. In this manner the annoyance caused by the collection of the shavings or fuzz is eliminated and the surface of the dictating cylinder l6 remains clean and free of these shavings or fuzz and hence the clarity of the dictation is not interferred with through the accumulation of these shavings or fuzz beneath the stylus point.

It will be understood that the above description and accompanying drawing comprehend only the general and preferred embodiment of my invention and that various changes in construction, proportion and arrangement of parts may be made within the scope of the appended claims without sacrificing any of the advantages of my invention.

The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor.

I claim:

1. In a device which records by engraving a surface of a record, the combination of a stylus having a point adapted to engrave a surface of a recording blank; means including an electric motor and shaft for relatively moving said stylus and blank so that the stylus point may range over a surface of the blank; a blank shavingsreceptacle formed at least in part of a pervious wall adapted to permit air flow through such wall; a pipe leading from adjacent said motor to said receptacle; a fan mounted on the motor shaft intermediate and juxtaposed to the motor and an end of the pipe, whereby the fan in operation moves air from adjacent the motor into the pipe; and a branch pipe having one of its ends adjacent the stylus point and its remaining end leading at an angle and joined to the pipe for drawing record shavings from the stylus point into the pipe through which the shavings are moved into the receptacle.

2. The combination of claim 1 characterized by means at the juncture of the pipe and branch pipe for moving record shavings-laden air into the branch pipe and thence into the receptacle by the force of motor cooling air driven by the fan into the pipe.

3. The combination of claim 1 characterized by the branch pipe being joined to the pipe by projecting thereinto in the direction of air flow in the pipe around said projection for moving record shavings-laden air from the stylus point into the pipe and thence into the receptacle by the force of motor cooling air driven by the fan into the pipe.

4. The combination of 'claim 1 characterized by the end of the branch pipe adjacent the stylus point being flared. 5. The combination of claim 1 characterized by the end of the pipe adjacent the fan having a funnel converging away from the outlet of the fan and into the pipe.

6. In a device which records by engraving a surface of a record, the combination of astylus having a point adapted to engrave a surface of a recording blank; 'means including a motor having a shaft for relatively moving the stylus and blank so that the stylus point may range over a surface of the blank, and a fan mounted on and revoluble with the motor shaft adjacent one end of the motor for cooling the motor by increasing the air flow from the motor when the fan is running, with a record shavings receptacle, and means for collecting the record shavings from the stylus point and depositing them in the shavings receptacle by the force of air moved by said fan.

7. In a device which records by engraving a surface of a record, the combination of a stylus having a point adapted to engrave a surface of a recording blank; a fan, means for driving the fan and relatively moving the stylus and blank; a recording blank shavings receptacle; a pipe having one end adjacent and receiving air from the fan and its other end connected to the receptacle; a branch pipe having one end adjacent the stylus point and its other end entering the side of the pipe and extending slightly toward the receptacle.

GUSTAVE MILLER. 

